- Enrolled participants can be currently taking medication but must be stabilized on their medication regimens before enrolling in the study (i.e., no medication has been started within 8 weeks, stopped within 6 weeks or titrated up or down within 4 weeks of study entry). Accordingly, if a patient's medication status must change during the course of the study, we will discontinue them in the study. We do not anticipate that this will occur frequently, as again, patients' medication regimens must be stable before enrolling in the study. No medications will be discontinued for the purpose of enrollment into the study.